Fill in the blanks in the following sentences: a. A solution having a pH equal to 7 at 25 o C is ………………… .. solution.
b. A solution having a pH greater than 7 at 25 o C is …… Solution.
c. A solution having a pH less than 7 at 25 o C is ……………… .solution.
d. Between two solutions of sodium hydroxide having pH values ​​13 and 12, the most basic is the solution that has pH ……

​

a. neutral

b. basic /alkaline

c. acidic

4. 13

the role of the microscope world in creating new materials .

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml